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September-October 2011

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Who's Who in Mineral Names: Igor V. Pekov (b. 1967)

Pekovite, SrB2Si2O8′, a member of the danburite group, the strontium analogue of danburite, was discovered at the famous Darai-Pioz alkaline complex in Northern Tadjikistan. Pekovite was found in the moraine of the Darai-Pioz Glacier on the southern slope of the Alai Range, in a blocky quartz lump, probably a fragment of the core of an alkaline pegmatite. Pekovite occurs as colorless, anhedral, equant grains to 0.3 mm, commonly intergrown with pectolite, quartz, aegirine, and Sr-rich fluorite. Among others, minerals of this assemblage are polylithionite, microcline, reedmergnerite, stillwellite-(Ce), leucosphenite, sogdianite, turkestanite, galena, calcite, kapitsaite-(Y), neptunite, sugilite, zeravshanite, pyrochlore, tadzhikite, baratovite, bismuth, sphalerite, fluorapatite, fluorapophyllite, and eudialyte-group members. Pekovite and its crystal structure were described by a team of Russian and Canadian mineralogists and crystal chemists (Pautov et al. 2004). It was named in honor of Igor Pekov, a senior scientist with the chair of mineralogy in the geological faculty of the M. V. Lomonosov Moscow State University. Pekov is one of Russia's most productive mineralogists and one of Russia's most prominent mineral collectors.

Dr. Michael Leybov, a renowned author and photographer, is publisher of Mineralogical Almanac.

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